Yuliusman, Y. et al. 2026. Use of activated carbon from NiO modified Polyethylene Terephthalate plastic bottle waste to optimize natural gas storage in Adsorbed Natural Gas (ANG) technology. SINERGI. 30, 1 (Jan. 2026), 239–246. DOI:https://doi.org/10.22441/sinergi.2026.1.022.